OpenCV Color Histogram

#include"stdafx.h"voidMyshowhist (iplimage* image1,iplimage*image2); Iplimage* Cvshowhist (iplimage*src);intMain () {//equalization of color imagesIplimage* Image= Cvloadimage ("e:\\c_vc_code\\text_photo\\girl004.jpg"); Iplimage* Eqlimage=cvcreateimage (cvgetsize (image), image->depth,3); //Channel Separationiplimage* Redimage=cvcreateimage (cvgetsize (image), image->depth,1); Iplimage* Greenimage=cvcreateimage (cvgetsize (image), image->depth,1); Iplimage* Blueimage=cvcreateimage (cvgetsize (image), image->depth,1); Cvsplit (image,blueimage,greenimage,redimage,null);//Use the Cvsplit function to decompose an image onto a single color channel  /*Cvnamedwindow ("Red", cv_window_autosize);  Cvnamedwindow ("green", cv_window_autosize);  Cvnamedwindow ("Blue", cv_window_autosize);  Cvshowimage ("Red", redimage);  Cvshowimage ("green", greenimage);  Cvshowimage ("Blue", blueimage); */  //cvequalizehist () is suitable for grayscale image histogram equalization, so the image must first be decomposed into a single channel//equalization of each channel separatelycvequalizehist (redimage,redimage);   Cvequalizehist (Greenimage,greenimage);     Cvequalizehist (Blueimage,blueimage); /*Cvnamedwindow ("Red2", cv_window_autosize);  Cvnamedwindow ("Green2", cv_window_autosize);  Cvnamedwindow ("Blue2", cv_window_autosize);  Cvshowimage ("Red2", redimage);  Cvshowimage ("Green2", greenimage);  Cvshowimage ("Blue2", blueimage); */    //Channel MergingCvmerge (blueimage,greenimage,redimage,null,eqlimage); //Show pictures and histogramsCvnamedwindow ("Source",1 ); Cvshowimage ("Source", image); Cvnamedwindow ("equalized",1 ); Cvshowimage ("equalized", Eqlimage); Cvsaveimage ("equalized.jpg", Eqlimage);  Myshowhist (Image,eqlimage); Cvwaitkey (0); Cvdestroywindow ("Source"); Cvdestroywindow ("result"); Cvreleaseimage (&image); Cvreleaseimage (&eqlimage); }voidMyshowhist (iplimage* image1,iplimage*image2) {Iplimage* hist_image1=cvshowhist (Image1); Iplimage* hist_image2=cvshowhist (Image2); Cvnamedwindow ("h-s Histogram1",1 ); Cvshowimage ("h-s Histogram1", Hist_image1); Cvnamedwindow ("h-s Histogram2",1 ); Cvshowimage ("h-s Histogram2", Hist_image2); Cvsaveimage ("histogram1.jpg", Hist_image1); Cvsaveimage ("histogram2.jpg", hist_image2);} Iplimage* Cvshowhist (iplimage*src) {Iplimage* HSV = cvcreateimage (cvgetsize (SRC),8,3 ); Iplimage* H_plane = cvcreateimage (cvgetsize (SRC),8,1 ); Iplimage* S_plane = cvcreateimage (cvgetsize (SRC),8,1 ); Iplimage* V_plane = cvcreateimage (cvgetsize (SRC),8,1 ); Iplimage* planes[] ={h_plane, s_plane}; /** H component divided into 16 levels, s component divided into 8 levels*/  intH_bins = -, S_bins =8; intHist_size[] ={h_bins, s_bins}; /** Variation range of H component*/  floatH_ranges[] = {0, the }; /** Variation range of S component*/  floatS_ranges[] = {0,255 }; float* ranges[] ={h_ranges, s_ranges}; /** Input image conversion to HSV color space*/Cvcvtcolor (SRC, HSV, CV_BGR2HSV); Cvcvtpixtoplane (HSV, H_plane, S_plane, V_plane,0 ); /** Create histograms, two-dimensional, evenly divided on each dimension*/Cvhistogram* hist = cvcreatehist (2, Hist_size, Cv_hist_array, ranges,1 ); /** According to h,s two flat data statistic histogram*/cvcalchist (Planes, Hist,0,0 ); /** Gets the maximum value of the histogram statistic for displaying the histogram dynamically*/  floatMax_value; Cvgetminmaxhistvalue (hist,0, &max_value,0,0 ); /** Set histogram display image*/  intHeight = -; intwidth = (h_bins*s_bins*6); Iplimage* hist_img = Cvcreateimage (Cvsize (width,height),8,3 );   Cvzero (HIST_IMG); /** Temporary unit image used for HSV to RGB color conversion*/Iplimage* Hsv_color = Cvcreateimage (Cvsize (1,1),8,3); Iplimage* Rgb_color = Cvcreateimage (Cvsize (1,1),8,3); intBin_w = width/(h_bins *s_bins);  for(inth =0; H < H_bins; h++)  {     for(ints =0; s < s_bins; s++)    {      inti = H*s_bins +s; /** Get statistics in the histogram to calculate the height shown in the image*/      floatBin_val =cvqueryhistvalue_2d (hist, H, s); intintensity = Cvround (bin_val*height/max_value); /** Gets the color represented by the current histogram, converted to RGB for drawing*/cvset2d (Hsv_color,0,0, Cvscalar (h* the. f/h_bins,s*255. F/s_bins,255,0));      Cvcvtcolor (HSV_COLOR,RGB_COLOR,CV_HSV2BGR); Cvscalar Color= CVGET2D (Rgb_color,0,0); Cvrectangle (hist_img, Cvpoint (i*bin_w,height), Cvpoint ((i+1) *bin_w,height-intensity), color,-1,8,0 ); }  }  returnhist_img;}

OpenCV Color Histogram